This is the term for when you are sitting on the toilet, and flush it (unknowingly sealing your fate) and the water (usually ice cold) comes up into contact with you. Often times with males, this cold water first comes into contact with the family jewels.
Dude, I was taking a nuke hiroshima and got hit with a surface to air missile.
I need a mop to clean the floor because I got hit with a surface to air missile.
This is the unyielding fear (or dread) of getting back on the toilet after getting hit with a Surface to Air Missile. This sometimes causes serious medical problems, or pooping of the pants, if it is not conquered in time. Sometimes the Psychological damage can be permanent. This is highly common on the Western Hemisphere.
Jacob-"Dude, I really have to take a nuke hiroshima."
Joe-"Just go, the bathroom is right there."
Jacob-"I'm afraid; last time I got hit with a Surface to Air Missile"
Joe-"Oh no! You have Ninja Phobia!"